Proponents of blockchain say it can make our food system more sustainable from farm to fork. But when Bitcoin alone is said to use more energy than Ireland annually, is there a fundamental chink in its armour?

Food makers need to scrutinise what is fed to the livestock used in their products in order to develop a more sustainable production system that will be able to feed the world’s growing population, forecast to reach 9bn people by 2040, a new report by...